井下p-t记录仪的设计

The Design of p－t Downhole Recording Meter

井下p－t记录仪是在井下进行高能气体压裂作业时，用来记录井下压力随时间变化关系的仪器。压裂效果与压力的大小、上升时间和压力保持时间有很大关系，记录结果对评价压裂效果，对今后作业的药量设计有重要意义。该仪器采用CMOS低功耗集成电路设计，根据应力的大小自动记录所需要的压力，操作简单、使用方便。实验证明电路设计是成功的。

The pressure－time(p－t) downhole recording meter is an instrument used to record downhole pressure data verse time during the formation breakdown in high－energy gas application, The effect of formation breakdown has a near relation with the breakdown pressure, its onset time and maintain time. The recording has a great significance in evaluating formation breakdown and designing explosive charge. This meter applies low power consumption CMOS design with a convenient operation and performs well in laboratory exper iments.